Covering machine



J. J. PLEGER COVERING MACHINE April 30, 1929.

Filed April 6, 1927 9 Sheets-Sheet ZweroZw'V dziaqfgzgyen April 30, 1929. J PLE ER 1,711,363

COVERING MACHINE Filed April 6, 1927 9 Sheets-Sheet 2 2% wweys mmii q April 30, 1929. J, J, MEG ER 1,711,363

COVERING MACHINE Filed April 1927 9 Sheets-Sheet 3 April 30, 1929.

J. J. PLEQSER COVERING MACHINE Filed April .6, 1927 9 Sheets-Sheet 4 Ziaezur April 30, 1929. J PLEGER 1,711,363

COVERIN MACHINE Filed April 1927 9 Sheets-Sheet 5 hag April 30, 1929. J. J. PLEGER COVERING MACHINE 9 Shets-Sheet Ewe d ari- M073 Filed April 6, 1927 5% m SQ N QM N. 0 w MW P Z Adm/2:22

April 30, 1929. J PLEGER 1,711,363

COVERING MACHINE Filed April 6, 1927 9 Sheets-Sheet 7 April30,1929. J-,PLE ER 1,711,363

COVERING 11110111111:

Filed April 6, 1927 9 Sheets-Sheet 8 April 30,,1929. .1. J. PLEGER COQERING MACHINE- Filed Aprii 6, 1927 9 Sheets-Sheet vr m m b Patented Apr. 39, 1929.

PATENT OFFICE;

JOHN J. PLEGER, or

COVERING Applica ti-on filed April 6,

This invention relates to improvements in machines for attaching covers to books, and more particularly to that type of machine adapted to attach paper covers topamphlets and the like.

One of the principal objects of the invention is to provide novel and improved means for applying adhesive to the cover, and the invention further resides in a generally improved construction involving novel details and features hereinafter set forth and illustrated in the attached drawings, in which:

liigure 1 is a side elevation of one end of a machine made in accordance with my invention;

Fig. 2 is a side elevation of the other end of the machine, Figs. 1 and 2 forming together a complete side elevation;

Figs. 3 and 4t are plan views corresponding to the parts of the machine shown respectivelyinFigslaIidQ;

Fig. 5 is an enlarged-plan view of a fragment of that end of the machine shown in Fig. 3;

Fig. 6 is a sectionon the line 6+6, Fig. 5;

'4' isa transverse section on the line 77,Fig.6;

Fig. 8 is fragmentary sectional View on the line 88, Fig. 4; i

Fig. 9- is a view in perspective of one of the conveyer lugs; I I Fig. 10 is an elevation ofthe forward end of tlie machine showing the opposite side to that shown in Fig; 2; j I

. Fig. 11 is an elevation oft-he transverse conveyor at the delivery endof'the machine;

Fig. 12 is plan view of the forward end of the conveyer shown in Fig. 11;

Fig. 13 is a section on the line 13-48, Fig. 11; and

Figs. 14 to views illustrating the various operations of the machine in the complete process.

Referring to the drawings, the machine comprises framework including legs or pedestale 1 and parallel spaced side beams 2 supported on pedestals. At one end of the frain eja's shown in F ig, 1 isinounted trans 91 nclusive, are diagrammatic versely of the machine feed table or chute Q 3,' this being pivotally mounted at l to pernit angular adj ustment Adj acent the inner end of the table 8 are a pair oftra'nsverse shafts!) and 6 which carry contacting feed ji'ol1s,,7 and 8 respectively, adapted to pass CHICAGO, ILLINOIS.

MACHINE.

1927. Serial No. 181,458.

the cover sheets received from the table 3 onto supporting guide bars 9 which extend longitudinally of the frame and are supported on transverse cross bars 11, see Fig. 3. The rolls 7 and 8 maybe advantageously provided with soft or sponge rubber faces.

It willbe noted that the table 3 is provided with transversely adjustable flange pieces 12 which may be ad usted in accordance with the width of the sheets to be fed into the maone shaft engaging the rolls of the other shaft in pairs to act as supporting rolls for the sheets as they pass between the feed rolls 5 and 6. In order to control the pressureb'etween the feed rolls, the bearings of the shaft 5 are made vertically adjustable; and adjustment thereof may be made manually through the medium of a shaft 14: which operatively connected with the said adjustable bearings through the medium'of vertical screw shafts 15, see Fig. 1, and bevel gears 16. The shaft 14 has at one end an operating wheel 17 by means of which the shaft may be rotated. Any mechanical paper feeder suitable for this purpose can be attached, or covers can be fed manually. I

In order to advance the sheets along the supporting bars 9 and through the various mechanisms which operate upon said sheets as iereinafter described, I provide a pair of Imounted on a transverse bar 24-. secured to two of the uprights 1. I The upper runsof the chains 18 move as shown in Fig. 7 in a plane slightly below the upper edges of the bars Q'Qbut the chains carry at spaced intervals lugs'25 which on the upper run ofthe chain project upwardly beyond the tops of] the said bars 9 and engage the sheets resting on the said bars to advance them along the latter, it being understood that during operation of the machine the chains'are in continuous operation. V i V 1 Adjacent the bars 9 at one side s a recessed guide bar 26 which IS'ZLClQPtGLl to receive one endless conveyor chains 18 which operate rolls 29, 29

edge of sheets supported by the bars 9, and

on the oppoiste side of the bars 9 fron'i the guide bar 26 are a plurality of flexible ele ments 2?, see Fig. 3, which project into the path of the sheet and hold the latter against and in the guide bar 26, the spring elements 27 being of such resilient strength as to in sure the proper positioning of the sheet against the guide bar without tendency to crumple or distort the sheet fron'i its normal fiat condition. In the present insance, the elements 27 are suu iported on a bar 28, which in turn is carried by the transverse bars 11 It will be noted from the foregoing description that sheets passed onto the bars 9 as described are carried along the latter by the moving chains 18. In this movement, the sheets eventually pass between positioning mounted on transverse shafts 3i and 3 i, as shown in Fig. (l. The shaft 31!. is carried by a pair of hell c 'anli levers 33 pivotally secured to the frame pieces 2, s shown in Fig. 3. These bell crank levers are ailjustably controlled by means of studs at which project from the sides of a tired beam 35 on the frame and through the upper projecting arn'is ot the bell crank levers 33, as shown in Fig. 6. A nut 36 on each of the studs 3% and a spring 3'7 conlii ed between the lever 33 and the beam afford means for adjusting the hell crank levers angularly about their pivots 38 to thereby adjust the shaft 31 and. the rolls thereon vertically and with respect to the rolls 29 on the shaft the latter being relatively fixed. Immediately in back of the rolls 29 are two sets of scorii rolls 39, these rolls operating in vertically arranged pairs. The upper ones of the rolls 39 are carried by brackets 41 adjustable tr nsverselv on the bar 35, as best sho n in Fig. 6, and held in adjust d position on the said bar by means i set screws The lower or .ie scoring are car-- ried upon a transverse shaft 4:3 ixi-riuntcd in the side beams and this shaft 43 also can ries outwardly of n scoring rollers and one on each side 'tllCl'QOi a pair of rubber-faced positioning rolls 4a which coact with similar rolls -15 supported in brackets slidably supportciil on the beam 35 and held in adjusted position on said beam by sot screws 3-7. The rollers 29 and the rollers l l and {l5 are adapted to hold the sheet. in position while the scoring rolls 8%) are operating thereon. It will be noted that the upper scori rolls S9 and the upper positioning rolls c a ljusted vertically in the brackets which carry them by means of adjusting nuts at the tops of the brackets, as shown in Fig. 6. One of each cooperating pair of rollers has a peripheral and circumferential groove while the periphery of the companion roller is formed to fitinto tie said groove. By reversing the relative positions of these rollers the sheets may be grooved from either underl,

side as desired. In the present instance, the sheets are given four scorings, the two central scorings which, as shown in Figs. 15 to 18, register with the rear edges of the book and which accordingly are spaced in accordance with the thickness of the latter, being made from the upper or inner surface of the cover sheet, and the two outer scorings which, as shown Fig. 21, form the hinges on which the cover bends away from the book, are made froin the under side of the sheet which constitutes the outer surface of the cover.

l rom the scoring rolls the sheets, traveling with the chains 18 as previously set forth, )a ss under a gluing roll 51, this roll being carried by a transverse shaft 5 mounted in the side frames and having surface contact with a flanged roller 53 mounted above the roll 51 on a .ransverse shaft 5 and this roller 53 in turn has surface contact with a third roller on a shaft 56 joru'naled in hearings on a receptacle 5? mounted in the frame. The roller 55, shown in Fig. 6, extends into the receptacle, which in operation contains an adhesive which is fed from the face ofthe roller to the roller 53, and thence to the roller 51. As shown. in 'Z, the roller 51 is so mounted that at TllQ bottom it lies slightly above the plane of the top of the sheet-supportir bars 9 so that in the absence means for elevating the sheets, as hereinafter described, the sheet will pass under without coming in contact with the said roll 51.

Means is provided, however, for elevating the sheets as they pass under the roller o1 so that suitable amounts of adhesive are transferred from the roll to the sheet. This mechanism is best illi'istrated in Figs. 6 and 7, and consists of an arm 58 which is secured to and extends reurwardly from the under sine of the receptacle 5? or, as in the present intsance,v from the bottom of a heating elen'ient 59 locat d he h the receptacle This arm 58 7' roller 51., and its forward one is slightlyupturned so that a sheet advanced by the chains as described will pass under the said arm 58. The outer end of the arm slotted for reception of a pair of forked levers 59 and 61., the lever 59 being positioned slightly in ad vance of the lever 61, as shown in 6. The lever 69 is attached at itslower end to a block 62 which journaled between members J3 and 64. as shown in Fig. '7, so as to be readily movable about its 132i s, and the block 62 also has projecting forwardly therefrom an arm 65 which immediately overlies one" end of a lever 66 plvotally mounted at 67 in the frame and extending transversely of the mad The opposite end of the lever 66 ms one end of lever arm 68 which is pivotally secured at 69 to the upper end of an arm Tl which is secured to a rock shaft 72 journaled in the frame between points 73, 73, as shown in Fig. 7. This shaft 2 also carries extends to aposition opposite the downwardly. By properly placing the' arm 7 5 projecting from the shaft.

said lever 66. and depresslng the lever 59, the sheet enthe lever 61, and the shaft is counterbalanced against the weight of the parts referred to by means of a counterbalance weight 74, see Fig. 6, which is adjustable longitudinally of an The lever 68 has in its upper side a notch .75 which,

when the said lever is elevated, is adapted to receive the-lower end 7 Got a depending arm on a transverse rock shaft 77 which shaft 1s ournaled bet-ween points-78, 78 on the frame. This shaft carries near its center arms 79between which is journaled a roller 81 which occupies a position directly below the roller 51, as well shown in 7. The weight of the parts carried by the shaft 77 is accurately counterbalanced.by a weight 82 on an arm 83 which projects from the said shaft.

It will now be seenthat a sheet advanced by the chains 18 as previously described will, after passing between the scoring rolls, en the lever 59 and will depress this lever. As a result, the arm is also depressed and will carry with it one end of the lever 66, with the result that the lever 68 is elevated around the pivot 69, thereby engaging the depending arm 76 in the notch or recess in the Immediately after engaging gages the lever 61 and depresses this lever, with the result that the shaft 7 2 is rocked and the arm 68 is advanced in the direction of movement of the sheet carrying with it the arm 76 of the sha it 77. The rocking in this mannerof the shaft 77 results in an elevation of the arm 79 and the roller 81 which presses the sheet which is then between the rollers 51 and 81 against the former, with the result that glue is transferred to the sheet. soon as the rear end of the sheet leaves the lever 59, the roller 81 is'released and moves levers 59 and 61 with respect to roller 51 and to each other the adhesive transferred to sheet may be confined to an area whose borders lie well within theedges of the sheet.

Positioned at the rear oftheadhesive container 57 and supported at that end by transvcrsecross bar 85, see Fig. 3. is a table88' which is eleva ed slightly above the bars 9 on which the she ts travehas neviously'd escribod. The top of the table 86, however, is lower than the tops of the carrying lugs 25 on the chains 18, and the table is divided longitudinally to proide for passage of the lugs of the chains. At both longitudinal. edges, the table is flanged vertically, as indicated at 87 and 88. This table is adapted to receive the books or phamphlets which are to be bound by" the sheets normally fed to the machine, as described, from the table The books are placed on the table so that the bound or closed edge lies against the flange 87,, which as shown is located approximately at the longitudinal center line of the machine, and the lugs 25 on the chain engaging the book adsion of the belts is controlled.

adjustably mounted above the table 86, as

shown in Fig. 4, to retain the edge of the book againstv the flange 87. At this point,

also, in themachine asecond set of the sheetcontrolling fingers 27 is provided to insure proper positioning of the sheet as it advances beneath the table 86.

The rear ends of the chains18 and the shaft 22 lie under the end of the table 86, as clearly shown in Fig. 41-. Immediately adjacent the en d of the said table is a conveyer consisting of a pair of opposed endless belts 91 and 92 which operate on pulleys 93 and 94C suitably mounted in the main frame, the belt 91 being positioned above the belt 92, as clearly shown in Fig. 2, and the two operating together to continue the movement of the parnplet and the covering sheet which are fed between them by the chains 18. A set of spring-pressed rollers 95 mounted immediately above the lower 'runiof the conveyer 91 controls the upward movement of thelatter and insuresa proper frictional grip upon the book passingunder neath the conveyer, while a corresponding set of rollers96 is located immediately below and supports the upper run of the conveyer 92. Each of the belts is provided with an adjustable idler puller 97 by means of which the ten- These idlers in the present instance are journaled on the ends of pivoted arm 98 having notched ed 'es engaged by a detent 99 which acts to hold the arm in the extended belt-tensioning position,

as clearly illustrated in Fig. 2. The belts functionnot only to continuethe forward 152 on, a shaft 153 operatively connected through spiral gears 15 1 and 155 withthe said screws.

' As shown in the belts 91 and 92 are relatively narrow and are positioned with respectto the flange 87 so that the backof the bookprojects'"appreciably beyond the edges of thebelts, as also does'the binding sheet whichoccupies a position beneath the book,

as shown in Fig. 16. As the sheet and book now occupying a predetermined relative position pass between the conveyers 91 and 92, the forward; edge of the sheet engages an upwardly and inwardly inclining rod 101, see Fig. 4, which functions to elevate that side of the sheet to a vertical position as shown in Fig. 18. At the same time, a set of rollers 102 engage the under side of the sheet at the rear edge of the book and press this port-ion of the sheet which has received the adhesive against the book. The continued advance of book and sheet resultsin a complete elevation of that portion of the sheet extending beyond the rear edge of the book until the sheet passes into a longitudinal uide slot 100. In advance of the passage of the sheet into the guide and slot a roller 103 comes into action, see Fig. 18, to press the sheet against the back of the book. While moving in the slot 100, a vertical 104 and a series of coacting horizontal and vertical rollers 105 and 106, see Figs. 19 and 20, function to press the center portion of the cov r containing the adhesive firmly around the back of the book. The action of the rollers is aided by the scored lines which correspond accurately with the rear edges of the book around which the sheet is bent, as previously set forth. As a. result, the book and cover when they leave the conveyers 91 and 92 are properly joined together.

Attention is directed to the roller 104, see Fig. 19, which is adjustable to accommodi-zte different thicknesses of books and which is adapted to roll the cover sheet around and against the back and sides of the book.

On leaving the conveyers 91 and 92, the books pass onto a table 107 and are fed transversely along the table by means of oscillating bars 108 which receive their motion from a crank 109 driven from the shaft 139 through transmission gearing. I

As shown in Figs. 11, 12 and 13, the table 107 consists of a pair of spaced parallel bars 156 between and on the outsides of which the bars 108 oscillate. The forward ends of the bars 108 reston rollers 157 and with the crank 109 rotating in the direction indicated the intermittent feeding action of the conveyer will be apparent. The throw of the crank 109 is adjustable to control the conveying action.

The various parts of the aforedescribed mechanism receive their .moven'ients from an electric motor 121 mounted in the frame, as shown in Fig. 1. This motor is connected through suitable transmission including gears 122 and 123 with a shaft 124 extending longitudinally of the machine. The shaft 124 is connected through a chain 125 with a shaft 126 also extending longitudinally of the frame, and the forward end of this shaft is connected through bevel gears 12'? and 128 and a gear 129 with a gear 131 journaled in the frame, and this gear carries a crank 132 to which is pivotally secured a rack 133. This with a plurality of pairs of scoring rolls, one

rack engages a pinion onthe shaft 5, which pinion is connected with the shaft through a suitable pawl and ratchet, as indicated at 134 in Figs. 1 and 3. By means of this gearing, the shaft 5 is given an intermittent rotary movement which periodically and at proper intervals feeds sheets from the table 3 onto the bars 9, previously forth. The shaft 126 is also operatively connected through suitable gearing including a bevel pinion 135 with the shafts 32 and 43 which respectively carry the rollers 29 and the lower scoring rolls 39 whereby these rolls are continuously rotated. The shaft 120 is also operatively connected through bevel gears 13 6 and 137 with the shaft and therethrough with the sprockets which operate the chains 18. At the rear end of the machine the shaft 1'20 is connected through a clutch 138 with an aligned shaft 139 which through bevel gears 141 and is connected with a transverse shaft 143 which carries the roller upon which the rear end of the belt 92 travels. The shaft 139 also is connected through suitable gearing with a stub shaft 144 which through bevel gears is connected with a transverse shaft 145 which carries the roller 94 on which the rear end of the belt 91 operates. The clutch 138 is controlled manually through a hand lever 146 which is connected with the clutch to suitable linkage including an arm 147, connecting rod 148 and lever 149.

[at its front end the shaft 124 is connected through a vertical shaft 151 with the shafts 56, 54 and 52 Which carry the gluing rolls 55 whereby these rolls are given a positive and continuous rotation. It will be noted further that the machine is adjustable for reception of binding sheets of different widths, the guide bar 20, the bar 28, the rolls 29 and the scoring rolls 39 being all transversely adjustable with respect to each other.

I claim:

1. In a binding machine, the combination with cover-sheet conveying means, of a plurality of pairs of cooperating scoring rolls adapted to operate on the sheets advanced by said conveyor, one roll of each pair being grooved. for the reception of the scoring periphery of the companion roll, and thesaid pairs of rolls being separated by a space corresponding substantially with the thickness of the hook to which the sheet is to beappiied.

2. In a binding machine, the combinati roll of each pair being circumferentially grooved at the periphery and constituting the female member of the scoring device of which the companion roll is the male member, and means for passing cover sheets through the rolls, said rolls being spaced apart in accordance with the thickness of the books to which the covers are to be applied.

3. In a binding machine, the combination with two rotary shafts, of a plurality of scoring rolls mounted on the shafts vith the rolls of one shaft adapted to cooperate individual- 1y with the rolls on the other shaft to constitute a plurality ot-independenlt scoringdevices, means for passing a cover sheet betweenthe ungrooved periphery of the companion roll, and means for passing a sheet between said rolls whereby the latter is scored from opposite sides simultaneously in accordance *ith the width of the book to which the cover is to be applied. 1 y

5. In a binding machine, the combination with scoring means consisting of at least one pair of cooperating scoring rolls, one of the said rolls being grooved circumferentially at the periphery and the other of said rolls operating in said roove, and. means for adjusting the relative positions of the r lls to vary the extent to which the periphery of one roll enters the peripheral groove oi the companion roll.

' '6. In a binding machine, the comblnation with means for supporting-a cover sheet and a book in superimposed and spaced relation,

of receiving means adjacent the supporting means, and means including a moving ele-' ment engaging both the sheet and book for transferring them to the receiving means in superimposed contacting relation.

7. In a binding machine, the combination with means for supporting a cover sheet and a book in superimposed and spaced relation, of receiving means adjacent the supporting nu i n'ieans including a moving element mg hoth the sheet andbook for transferring them to the receiving means in superin'iposed contacting relation, and ad ustable 11 P38 in saidelenient for determining the rei. tire positions the superimposed sheet and book. I

8. In a binding machine, the combination with means for supportinga cover sheet and a book in superimposed and spaced relat on, of receiving means adjacent the supporting 3, means including a movingv element both the sheet and book for transthem to the receiving means in superimposed contacting relation, and ad ustable means in said element adapted to engage the book for determining the relative position of the superimposed sheet and book.

9. In a binding machine, the combination with a conveyor comprising means for retaining a cover sheet and a book in proper relative positions, with one side of the book lying against the correspondlng slde of the cover sheet and with the opposite side of the cover sheet extended, of means located adjacent the fconveycr'for folding the. extended portion of the sheet around the back and the uncovered side of said book.

10. In a book bindingmachine, the combination with a conveyer, oi means for passing acover sheet and a book to said conveyer, With,

one side of the book lying against a corresponding side of the cover sheet and with the other side of the cover sheet extended, and means adjacent the conveyer for folding the extended portion. of the sheet around the back and the uncovered side of said book.

11. In a book binding machine, the combination with a conveyer for a cover sheet, of means for scoring the sheet from one side along parallellines spaced in accordance with the thickness of the book to which the cover is to be applied, and means for scoring the sheet from the opposite side along parallel lines running adjacent to and outwardly of the scored lines first mentioned.

12. In a book binding machine, the combination with a conveyer for a cover sheet, of means for scoring'the sheet from one side along parallel lines spaced in accordancewith the thickness of the book to which the cover is to be applied, means for scoring the sheet from the opposite side along parallel lines running adjacent to and outwardly of the scored lines first mentioned, means for relatively positioning the book and the cover sheet so that one rear edge of the book corresponds withone oi the inner scored lines, a conveyor adapted to receive the book and cover in the aforesaid relative positions iroin the positioning means, and means adjacent the con-- veyer adapted to fold the extended portion of the cover sheet around the back of the book to bring the other of the inner pair of scored lines into a position registering with the other back edge of the book, substantially as described. 1

. In a binding machine, the combination with a conveyer, of means for feeding a cover sheet and a book to said conveyor in horiz: tal superimposed position, and means adjacent the conveyer for folding the cover around the book as it is advanced on the conveyer.

1 In a binding machine, the combination withopposed endless conveyers, of means for jacent the conveyors and acting upon the cover sheet as it advances in the conveyer to fold the extended portion of said sheet around the back of said book. I

15. In a book binding machine, the combination with a pair of opposed endless conveyers, of a plurality of relatively fixed rolls positioned in back of the inner run of one of the conveyers, a second set of rolls correspondingly positioned with respect to the other conveyer, and resilient means tending to hold the rolls of saidsecond set in an advanced position determining the space between the adjacent runs of the two conveyers.

16. In a book binding machine, the combination with a conveyer including means for retaining a cover sheet and the book in horizontal superimposed relation with the hook overlying one side of the cover sheet and the other side of the cover sheet extended. f-JOTH'l the back of the book, means for elevating the extended part of the sheet, means for folding the mid portion of the sheet closely around the back and the adjacent portions of the sides of the book, and means including rollers engaging the back and the top and bottom sides of said book adjacent the back for forcing the sheet firmly against the book.

17. In a book binding machine, the com-- bination with a conveyer including means for holding a book and a cover sheet in superimposed horizontal position with the book overlying one side of the sheet and the opposite side of the sheet being extended beyond. the back of the book, of means adjacent the conveyer for elevating the sheet, a roller for bringing the sheet into close contact with the back of the book, a second roller adapted to press the sheet against the back and the adjacent portions of both the upper and lower sides of the book, and means including rollers engaging both the upper and lower sides and lit , back of the book for wiping the cover closely against the book surfaces.

18. In a binding machine, the combination with opposed endless conveyers, of means for feeding a book and a cover sheet therefor between said conveyors with one side of the book against one side of the sheet and with the other side of the sheet ext-ended, means adjacent the conveyers for folding the ext nded portion of the sheet around the hack of the book, means for regulating the tension of the respective conveyors including in each instance a pivot-ally notched arm having an idler roller at the outer end engaging the con- Veyer, and a pawl operating in conjunction with said notched edge to retain the pivoted arm in extended and conveyontightening position. V

19. In abook binding machine, the combination with superimposed supports upon which respectively a book and cover sheet are adapted to lie flat, of means for predeterminedly and relatively positioning said book and cover upon the supports, receiving means for said book and cover, means for sliding the book and cover form their respective supports so that they lie upon said receiving means in predetermined relative positions with one side face of the book against one side of the cover sheet and with a predetermined portion of the sheet extending beyond the rear edge of the book, and means for folding said extended part of the sheet around the rear edge and against the other face of the book.

20. In a book binding machine, the combination wit-h means for applying a strip of adhesive to a cover sheet in predetermined po' sition, of mechanism for bringing a book and cover sheet together with one side face of the book in contact with the cover sheet at one side of the adhesive strip and with a rear corner of the book in predetermined parallel relation to said strip, and means forfolding the sheet around the rear edge and other side of the hook with the adhesive in contact "with said rear edge.

21. In a book binding machine, the combin ation with means for scoring a cover sheet on parallel spaced lines, of means for applying an adhesive to the sheet between said lines, mechanism for bringing abook and cover sheet together with one side face of the book in contact with the cover sheet at one side of the adhesive strip and with one rear corner of the book on one of the scored lines, and means for folding the sheet around the rear edge and other side of the book with the adhesive in contact with said rear edge.

22. In a binding machine, a coverapplying roll comprising a cylindrical portion adapted for engaging the rear edge surface of a book, said cylindrical portion terminating at each end in an extended circumferential convexed flange, which flanges are adapted to engage the opposite side surfaces of the book adjacent the rear edge to press a cover tightly around and against said surfaces.

JOHN J. PLEGER. 

